What are they?
This one seems to be a tree?
Still not sure what this tree is. Mulberry, perhaps?
UPDATE (August 21, 2010): The weeds are GONE! After doing a bit of research, we decided they had to go. William dug them out a few days ago, so, now it's just the poeonies, a few Lillies of the Valley and a few Violets in the patch. :-)